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A device for preventing a primary relief valve in a mud system from opening at a pressure lower than a nominal opening pressure includes a flow restrictor between a mud pump of the mud system and the primary relief valve. In addition, the device includes a cavity between the flow restrictor and the

A device for preventing a primary relief valve in a mud system from opening at a pressure lower than a nominal opening pressure includes a flow restrictor between a mud pump of the mud system and the primary relief valve. In addition, the device includes a cavity between the flow restrictor and the primary relief valve.

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1. A method for preventing a primary relief valve in a mud m from opening at a pressure substantially lower than a nominal opening pressure, wherein the mud system includes a mud pump, the method comprising: installing a flow restrictor between the mud pump and the primary relief valve;providing a c

1. A method for preventing a primary relief valve in a mud m from opening at a pressure substantially lower than a nominal opening pressure, wherein the mud system includes a mud pump, the method comprising: installing a flow restrictor between the mud pump and the primary relief valve;providing a cavity between the flow restrictor and the primary relief valve; andplacing a second relief valve in parallel with the flow restrictor. 2. The method of claim 1, wherein the flow restrictor comprises a tubular having a diameter smaller than a characteristic dimension of the cavity and a length greater than the diameter. 3. The method of claim 2, further comprising: selecting the characteristic dimension of the cavity to equal the cubic root of the cavity. 4. The method of claim 1, wherein the flow restrictor comprises an opening in a plate, wherein the opening has a diameter smaller than a characteristic dimension of the cavity. 5. The method of claim 1, wherein the second relief valve has a nominal opening pressure that is less than or equal to the nominal opening pressure of the primary relief valve. 6. A device for preventing a primary relief valve in a mud system from opening at a pressure lower than a nominal opening pressure, wherein the mud system includes a mud pump, the device comprising: a flow restrictor positioned between the mud pump and the primary relief valve;a cavity provided between the flow restrictor and the primary relief valve; anda second relief valve positioned in parallel with the flow restrictor. 7. The device of claim 6, wherein the flow restrictor is provided in the second relief valve. 8. The device of claim 7, wherein the second relief valve is a rupture disk. 9. The device of claim 8, wherein the flow restrictor is provided in the rupture disk. 10. The device of claim 6, wherein the flow restrictor comprises a tubular having a diameter smaller than a characteristic dimension of the cavity and a length greater than the diameter of the tubular. 11. The device of claim 6, wherein the flow restrictor comprises an opening in a plate, wherein the opening has a diameter smaller than a characteristic dimension of the cavity. 12. The device of claim 11, wherein characteristic dimension of the cavity equals the cubic root of the cavity. 13. The device of claim 6, wherein the second relief valve is in series with the cavity. 14. The device of claim 6, wherein second relief valve has a nominal opening pressure that is less than or equal to the nominal opening pressure of the primary relief valve. 15. A mud system, comprising: a mud pump;a primary relief valve configured to prevent excessive pressurization of the mud system;a dampener system positioned between the mud pump and the primary relief valve, wherein the dampener system comprises: a flow restrictor; anda cavity positioned between the flow restrictor and the primary relief valve;wherein the dampener system further comprises a second relief valve arranged in parallel with the flow restrictor. 16. The mud system of claim 15, wherein flow restrictor includes an opening having a diameter smaller than a characteristic dimension of the cavity. 17. The mud system of claim 16, wherein the second relief valve is arranged in series with the cavity.